Giada De Laurentiis - Sucky Face With New Boyfriend

Giada De Laurentiis moves fast ... and she's got fast moves.

The cooking star and her new BF Shane Farley were all over each other in Houston Saturday night at La Grange bar.

Giada -- whose divorce became final in September -- was all over Shane, and he was more than a willing participant.

Giada was in town for a book signing earlier in the day ... lipstick in tack.